Part obtained by selective melting of a powder comprising a main element and rigid secondary elements

A part obtained by selective melting of a powder on a support plate, this part comprising:

• a main element, and
• a plurality of secondary elements, these secondary elements supporting the main element between a lower surface of this main element and the support plate,
• wherein the secondary elements are adapted to be detached from the main element,
• wherein the lower surface of the main element comprises:
• a first surface portion, and
• at least one second surface portion
• wherein the first surface portion makes, with the support plate, an angle α1 of less than a predetermined value, and the second surface portion makes, with this support plate, an angle α2 greater than or equal to this predetermined value, wherein the predetermined value is a single value between 20° and 30°, and
• wherein the first surface portion is entirely supported by a first secondary element of the plurality of secondary elements and the second surface portion is partially supported by second secondary elements of the plurality of secondary elements,
• wherein both the main element and secondary elements are composed of laser sintered melted powder;
• wherein the lower surface of the main element comprises a third surface portion that makes, with the support plate, an angle α3 of less than the predetermined value, wherein the third surface portion is supported by third secondary elements of the plurality of secondary elements, wherein the third secondary elements include head portions supported by body portions, wherein the head portions meet and entirely support the third surface portion.